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[1]张延峰,唐青龙,裴毅强,等. 碳氢燃料预混火焰中苯的生成规律[J].燃烧科学与技术,2012,(04):319-325.
 ZHANG Yan-feng,TANG Qing-long,PEI Yi-qiang,et al. Emission of Benzene from Premixed Hydrocarbon CombustionFlame in Constant-Volume Bomb[J].Journal of Combustion Science and Technology,2012,(04):319-325.
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 碳氢燃料预混火焰中苯的生成规律()
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《燃烧科学与技术》[ISSN:1006-8740/CN:12-1240/TK]

卷:
期数:
2012年04
页码:
319-325
栏目:
出版日期:
2012-08-15

文章信息/Info

Title:
 Emission of Benzene from Premixed Hydrocarbon Combustion
Flame in Constant-Volume Bomb
作者:
 张延峰唐青龙裴毅强白洪林覃玉峰王 璇李志军
天津大学内燃机燃烧学国家重点实验室,天津 300072
Author(s):
 ZHANG Yan-fengTANG Qing-longPEI Yi-qiangBAI Hong-linQIN Yu-fengWANG XuanLI Zhi-jun
 State Key Laboratory of Engines,Tianjin University,Tianjin 300072,China
关键词:
 碳氢燃料预混火焰定容燃烧弹火焰结构CHEMKIN 软件
Keywords:
 benzenehydrocarbonpremixed combustion flameconstant-volume bombCHEMKIN software
文献标志码:
A
摘要:
 为了研究碳氢燃料预混火焰中苯的生成规律,首先在定容燃烧弹上进行了实验,对不同工况下,90 号汽油
和模拟汽油(由异辛烷和正庚烷按9∶1 的质量比例配制)燃烧产物中的苯进行了采集和定量分析;随后利用高速摄
像机对这两种燃料在定容燃烧弹中的燃烧图像进行了拍摄,将定容燃烧弹中的预混燃烧火焰划分热焰区、蓝焰区和
冷焰区;最后,利用CHEMKIN 软件对不同火焰结构区域中模拟汽油的燃烧过程进行了化学动力学分析.结果表
明,苯在预混火焰中的冷焰、蓝焰区域内形成,并在热焰中完全氧化;苯来源于未完全燃烧的碳氢,其排放量取决
于未完全燃烧区中苯的质量分数和未完全燃烧区的容积;汽油燃烧过程中形成的碳粒在一定程度上能减少苯的排放
量;汽油机冷起动时,燃烧室壁面吸附作用将对苯的排放量有重要影响.
Abstract:
 To study the emission characteristics of benzene in premixed hydrocarbon combustion flames,an experiment
was carried out on a constant-volume bomb under different experimental conditions. Benzene in exhaust gas was
collected and quantified. Photographs of the combustion process of hydrocarbon in bomb were taken by a high speed
camera. The space in bomb was divided into complete combustion zone,incomplete combustion zone and unburned
zone based on the definition of different flame stages(hot flame stage,blue flame stage and cool flame stage). After
that,a numerical simulation of the chemical kinetics of quasi-gasoline which is composed of iso-octane and nheptane
in a mass ratio of 9∶1 was carried out by CHEMKIN under different thermal boundary conditions. Results
indicate that benzene forms in cool flame and blue flame and is oxidized in hot flame. The amount of benzene in exhaust
gas is determined by the mass of benzene in the incomplete combustion zone,i. e. the concentration of benzene
in incomplete combustion zone and the volume of incomplete combustion zone. Soot generated in combustion can
reduce benzene formation to a certain extent. The absorption effect of cylinder wall to air-fuel mixture may result in
higher benzene emission in engine cold start condition.

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备注/Memo

备注/Memo:
 收稿日期:2011-10-28.
基金项目:国家自然科学基金资助项目(50506021;50976076);天津市高等学校科技发展基金资助项目(20080417);天津市应用基础
与前沿技术研究计划重点资助项目(11JCZDJC23200).
作者简介:张延峰(1972— ),男,博士,副研究员,zhyf@tju.edu.cn
通讯作者:裴毅强,peiyq@tju.edu.cn
更新日期/Last Update: